pci_cfgreg.c revision 84412 
1/*-
2 * Copyright (c) 2001 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/ia64/pci/pci_cfgreg.c 84412 2001-10-03 08:25:58Z dfr $
27 */
28
29#include <sys/param.h>
30#include <machine/pci_cfgreg.h>
31#include <machine/sal.h>
32
33#define SAL_PCI_ADDRESS(bus, slot, func, reg) \
34	(((bus) << 16) | ((slot) << 11) | ((func) << 8) | (reg))
35
36int
37pci_cfgregopen(void)
38{
39	return 1;
40}
41
42u_int32_t
43pci_cfgregread(int bus, int slot, int func, int reg, int bytes)
44{
45	struct ia64_sal_result res;
46
47	res = ia64_sal_entry(SAL_PCI_CONFIG_READ,
48			     SAL_PCI_ADDRESS(bus, slot, func, reg),
49			     bytes, 0, 0, 0, 0, 0);
50	if (res.sal_status < 0)
51		return (~0);
52	else
53		return (res.sal_result[0]);
54}
55
56void
57pci_cfgregwrite(int bus, int slot, int func, int reg, u_int32_t data, int bytes)
58{
59	struct ia64_sal_result res;
60
61	res = ia64_sal_entry(SAL_PCI_CONFIG_WRITE,
62			     SAL_PCI_ADDRESS(bus, slot, func, reg),
63			     bytes, data, 0, 0, 0, 0);
64}
65